Lubricating oil filter mounting



April 1952 P. L. FRANCOIS 2,591,248

LUBRICATING OIL FILTER MOUNTING Filed Nov. 50, 1949 B A/I/AMI r A#orneys Patented Apr. 1, 1952 UNITED STATES PATENT OFFICE 2,591,248LUBE-EATING 01L mrsamousrmo Pauli. Francois, Short Hills, N. J.

p li qn November 30, 1.948; Ser l No. 130,164 2 Claims (01; 210-94,)

1 This invention relates to a lubricating-oil filter mounting adapted tobe used with internal (3pm? bustion engines such as those employed inautomobiles. Such engines are customarily provided with a lubricatingsystem to which oil is supplied under pressure by an oil pump whichdraws the oil from the engine crank-case which serves as a reservoir;and it is customary to remove impuri ties from the lubricating oil byproviding a filter through which a portion of the pumped oil passes.Obviously, such oil filters should be readily replaceable, and it is oldto provide a filter having an externally threaded end, provided withinlet and outlet passages, which may bescrewed into a part mounted on oradjacent the engine which is so connected to the oil supply system that,a portion of the pumped oil passes to it, and through the filter andback to the oil supply system. Many ways of connecting a filter to anoil lubricating system have been devised, but these are Subject q var oub t o It, is customary to form in the crank-case of automohile enginesan oil gallery or conduit which term part of the lubricating system andto which lubricating oil is supplied by the oil puzpp. 'I he filtermounting which is the sub jeet of the present invention is unique inthat it is adapted to. be mounted directly on the crankcase where theoil gallery is located, and provides both tor Withdrawal from the oilgallery oi; the portion of the oil to be filtered and for the, de-.livery of the'filtered oil directly into the crankcase which serves asthe oil reservoir. This filter mounting is provided with a threadedcavity adapted to receive the threaded end of the filter hav n the inletand outlet passage; and the filter mounting has the advantage of easyinstallation, since it is merely necessary to. provide an opening in theouter wall of the. oil, allery and a threaded hole extendingfrom the oilgallery through its inner wall into the cranlgcase, in order to permitinstallation of'th filter mounting. Thus, it is a simple matter toattach the filter mounting to an engine having an oil gallery.

The form and construction of the oil filter mounting which is thepresent invention, and the manner in which it is attached to an engine,will be understood from the following description, taken in connectionwith the accompanying draw! ing in which Fig. 1 is a side elevation ofthe filter mounting; Fig. 2 is a sectional elevation thereof; Rig. 3 isasectional view showing thefilter; mounting attached to an engine, andalso show-ing a. pgr tipn or a filter cooperating with said;mount;-.

i of the engine block is shown as bounded by the inner, Wall 8 and theouter wall H). Lubricating oil under pressure is supplied to the oilgallery 6 by an oil pump (not shown) drawing oil from the enginecrank-case which serves as a reservoir, as hereinhefore, mentioned.Preparation for the installation 0f. the filter mounting (about to hedescrihed) requires merely the drilling of an opening l2 in the. outerwall H] of the oil gallery; and

the dril in and threading of a hole It in the inner wall 8 of the oilgallery concentric with the opening [-2 and extending from the oilgallery intothe i side of the engine crank-case.

As. shown in the drawing, the filter mounting which is the presentinvention comprises a body portion {6. having n internally threadedcavity [8 adapted to receive the externally threaded end 20 of an oilfilter (of conventional form hereinafter described) provided with athreaded extension having inlet and outlet passages as shown in Fig. 4.Extending from the body portion it of the filter mounting is acylindrical portion 26 which (as shown in Fig. 3) is adapted to enterthe opening l2 in the outer wall Id of the oil gallery, a gasket 2'!being interposed between the wall i0 and the end of the cylindricalportion 26. Extending axially from the cylindrical portion 26, is anexternally threaded tip 28 which (as shown in Fig. 3) is adapted tocooperate with the threaded hole l4 extending from the oil gallerythrough its inside wall 8 into the crank-case. Locate axially andextending through said body portion It, cylindrical portion 26 and tip 28, from the cavity l8 is an oil-return passage 29 which is small enoughin crossesectional area to limit the amount of oil flowing through theoil filter to a fraction oi the total oil flowing in the oil gallery.The body portion 16 and the cylindrical portion 26 are provided with an.oil-wsupplypassage 30, 3i 3.2 permitting the fiow of oil from the oil,gallery '6. to. the threaded cavity l8, and theref orn to the inlet.passages of the. filter which are pmvided the. threaded end 2.0. of thelatter as shown in. Fig. 4. As shown in Fig. 2, at the junc-. tion of,the passages. 30. and 3,! there, is avalve seat. 3.4. with. whichcooperates a movable valve:

memb r, preferably n the form of. a all 3 whi h is r dinsly h ld a ainstsaid valve seat 34.;bya oi1edsn n 3.1 whi h at one nd abuts the tsunamia. the other endahuts a. p us 3.8-

screwed into the threaded end of the oil supply passage 3|. The branchpassage 32 extends through the cylindrical portion 26 into the oilsupplypassage 3| in which the spring 36 is located, thereby permitting oil tofiow from the oil gallery 6 into the supply passage 3| below the valveseat 34. As shown in Fig. 2, the valve member 36 is provided withactuating means in the form of a valve stem 42 provided with a head 44;and the valve stem 42 extends through the oil supply passage 35 and intothe threaded cavity I8. Therefore, the head 44 is adapted to be engagedby theend 'of an oil filter when the latter is inserted in the filtermounting, thereby moving stood that the purpose of the valve justdescribed is to prevent oil from flowing from the oil gallery 6 andthrough the passage 30, 3| and 32 into the threaded cavity IS in thefilter mounting, if a filter is removed from the filter mounting whilethe engine is running and the lubricating oil in the oil gallery 6 isunder pressure. Of course, this valve may be omitted from the filtermounting, but it is believed to be desirable to include it.

The oil filter, partly shown in Fig. 3,",which forms no part of thepresent invention, will now be described in order that the manner inwhich it cooperates with the filter mounting may be' understood. Theouter casing 50 of said filteris provided with a threadedcup-shapedextension' 52 designed to cooperate with the internallythreaded cavity is in the filterfimounting'. 'As shown in Fig. 4, thebottom of the cup shaped' extension 52 is provided near its peripherywith inlet openings 53 and a central outlet opening 54. Within the outercasing of the filter is a filtering element comprising a'perforated tube55 surrounded by filtering material 56 encased within a cylindricalscreen 55 which is attached at its edges to disks (only one of which isshown) which are mounted on the perforated The unperforated end 55' ofthe-tube tube 55. 55 extends into the cup-shaped threadedend52 of thefilter casing and its end is attached there.- to; and a space isprovided for the flow of oii between the cup-shaped member 52 and thetube 55, and between the casing 50 and the disks'fi-t and the screen 58,as will be evident from Fig/3. It will be understood that the oil to befiltered enters the filter through the inlet openings 535 cup-shapedextension 52 of the filter.

The manner in which a portion of thei'lubri' cating oil passing throughthe oil gallery 5'is fed to and through the oil filter will beobviousfrom" Fig. 3. The oil enters the branch passage 32, flows throughthe passage 3| and passes around the valve member 35 which is then' outof tengagement with its valve seat 34, and flows through the passage 30into the bottom ofilhepavity 18;

and then through the inlet openings 53. and into the space between thefiltering element and the casingof the filter. This oil flows throughthe .screen 58 and the filtering material 56 into the perforated tube55, and from that .tube flows through the outlet opening 54 into thespace in the bottom of the cavity l8 bounded by the washer 62, fromwhich the oil flows through the oil-return passage 29 and into thecrank-case of the engine. As hereinbefore explained, the passage 29 issmall enough in cross-section to limit the amount of oil flowing throughthe filter to a fraction of the total oil flowing in the oil gallery 6.

Thus the filter mounting which has been described serves as a means forconnecting the inlet passages of arenewable oil filter to the oilgallery of an engine, and for connecting the outlet passage of thefilter to the crank-case of the engine. What is claimed is:

1. In combination with the crank-case wall of an internal combustionengine having an oil gallery provided with an opening in its outer walland with a threaded hole extending from the oil gallery into the enginecrank-case, a renewable oil filter having an externally threaded endprovided with inlet and outlet passages, and a filter mountingcomprising a body portion having an internally threaded cavity adaptedto receive the externally threaded end of said oil filter, a cylindricalportion extending from said body portion and adapted to enter and fitthe opening in the outer wall of the oil gallery, and an externally.threaded tip extending from said cylindrical portion and adapted tocooperate with the threaded hole extending from the oil gallery into thecrank-case, said body and cylindrical portions being provided with anoil-supply 'pas sage effecting the flow of oil from the oil gallery tosaid threaded cavity and to the inlet passages of the filter, and saidcylindrical portion and said tipbeing provided with an oil-returnpassage effecting the flow or oil from the outlet passage of the filterand from said cavity into said crankcase.

2. For use with an internal combustion engine having a crank-case Wallcontaining an oil galleryprovided with an opening in its outer wall andwith a threaded hole extending from the oil gallery into the enginecrank-case, an oil filter mounting having a body portion provided withan'internally threaded cavity adapted to receive an externally threadedend of an oil filter, a cylindrical portion extending from said bodyportio'n'and adapted to enter and fit the opening in the outer wall ofsaid oil conduit, and an external- 1y threaded tip extending from saidcylindrical portion and adapted to screw into the threaded hole in theinner wall of said oil conduit, said Number Name Date 1 1,228,837Schulse June 5, 1917' 1,791,046 'sweetland 'Feb. 3, 1931 1,982,376 DeLancey Nov. 27, 1934 2,203,668. Burckhalter June 11, 1940 2,211,305Werder Aug. 13, 1940 2,401,674 Vizay June 4, 1946 body'and cylindricalportions being provided with an oil supply passage. adapted to effectthe flow of oil from said oil conduit to said threaded cavity in thebody portion of the filter mounting, and said cylindrical portion andtip being provided with an oil return passage adapted to effect the flowof oil from said threaded cavity into said crank-case.

PAUL L. FRANCOIS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

